Add NEWS.md for #471

Author: brookslogan

NEWS.md

@@ -34,6 +34,10 @@ Pre-1.0.0 numbering scheme: 0.x will indicate releases, while 0.x.y will indicat
   format.
 - Improved documentation web site landing page's introduction.
 
+## Cleanup
+- Added optional `decay_to_tibble` attribute controlling `as_tibble()` behavior
+  of `epi_df`s to let `epipredict` work more easily with other libraries (#471).
+
 # epiprocess 0.7.0
 
 ## Breaking changes:

R/methods-epi_df.R

@@ -3,6 +3,10 @@
 #' Converts an `epi_df` object into a tibble, dropping metadata and any
 #' grouping.
 #'
+#' Advanced: if you are working with a third-party package that uses
+#' `as_tibble()` on `epi_df`s but you actually want them to remain `epi_df`s,
+#' use `attr(your_epi_df, "decay_to_tibble") <- FALSE` beforehand.
+#'
 #' @template x
 #' @param ... additional arguments to forward to `NextMethod()`
 #'